--- denemo-0.9.6/pixmaps/denemo.desktop
+++ denemo-0.9.6/pixmaps/denemo.desktop
@@ -4,7 +4,7 @@
 StartupNotify=true
 Terminal=false
 Type=Application
-Categories=GNOME;Audio;AudioVideo;Music;Education
+Categories=GNOME;GTK;Audio;AudioVideo;Music;Education;
 
 Name=GNU Denemo
 Name[de]=GNU Denemo